Wire gauge



A. G. NATZKE Dec. 12, 1950 WIRE GAUGE 2 Sheets-Sheet ,1

Filed Aug. 7, 1946 INVENTOR.

A. G. NATZKE Dec. 12, 1950 WIRE GAUGE 2 Sheec-Sheet 2 Filed Aug. 7, 1946INVENTOR.

Patented Dec. 12, 1950 WIRE GAUGE Alfred G. Natzke, New York, N. Y.,assignor to Lamar Slide Fastener Corp., New York, N. Y., a corporationof New York Application August 7,1946, Serial No. 689,065

10 Claims. (Cl. 33174) This invention relates to a device to be employedin connection with a step in the manufacture of slide fasteners.

In the following description, reference will be made to one particularmethod for the manufactlre of scoops or slide fastener elements forslide fasteners, but it is to be clearly understood that this is donesolely for the sake of perspicuity, and that my invention and anyapparatus embodying my invention can be applied to the manufacture offastener elements by other methods. Likewise, a person skilled in theart, exercising mechanical ingenuity, could modify the details of myinvention and adapt it to applications somewhat different from the oneherein disclosed.

I preferably contemplate to apply my invention to a method for themanufacture of fastener elements which comprises forming on a wire orstrip stock a series of embryo fastener elements, by passing theoriginal wire or strip through a machine which will be designated,followin a practice common in the art, as the wire rolling mill.Likewise, the word wire will be used to designate any and all stockmaterials used in the manufacture of fastener elements, it beingunderstood that this is done for the sake of brevity and implies nolimitation, and especially does not imply that the cross section of thestock material must be circular.

As is well known in the art, a fastener element comprises a head and apair of spaced jaws, which jaws are to be closed by clamping them on theedge of a tape to form a fastener stringer. The head comprises aprojection and a mating recess on the opposite side.

As the wire is passed through the rolling mill, it is deformed toacquire the shape illustrated in Figs. 2 and 3, that is, it is flattenedand a series of head projections and mating recesses are coined therein,which recesses and projections constitute the embryo elements. Saidembryo elements closely follow each other, so that there is no wasteinvolved in cutting the rolled wire into individual fastener elements.-

It is well known that the finished fastener elements must conform tocertain requirements of uniformity in their shapes and dimensions, in

, order to assure a smooth and even operation of in extreme cases mayrender this latter inoperative.

Therefore, in order that satisfactory fastener wire.

elements may be produced by a shearing operation from a rolled wirewhich has defined thereon the embryo elements, said rolled wire alsomust conform to certain requirements. My invention is directed to acontrol device to be applied to the wire rolling mill, which deviceconstantly gages the rolled wire, to see that it is properly formed, andif it is not properly formed, that is, if the irregularities appearintherein after the rolling operation exceed certain predetermined narrowtolerances, automatically stops the wire rolling mill and also signalsto the operator which of the properties of the rolled wire isunsatisfactory, to permit prompt correction of the defect without anyfurther investigation.

The device to which this invention relates is concerned with threepropertie of the rolled The first is the overall width of the wire,identified as a in Fig. 2. The second is the overall height of the headprojections, identified as b in Fig; 2. The third is the relativecentering of the head projections and recesses. These latter, if therolling operation is properly carried out, will be inexactlysuperimposed relationship, so that the heads of the finished fastenerelements may engage each other smoothly and precisely, as required.However, if the rolling mill does not function well, projections andrecesses will be laterally shifted with respect to each other, and thefinished elements will be defective. In such a case, production must bestopped, and the defect repaired, so that head projections and recessesmay occupy the same centered position on the rolled wire, and be trulymating.

Inasmuch as the device to which this invention relates gages the threeproperties aforementioned, and also stops the wire rolling mill or likemachine if the same are not satisfactory, the device will be designatedas a combined gage control mechanism, but the single word "gage will beoften used alone for the sake of brevity.

It is the general object of this invention to provide a combined gagecontrol mechanism for a wire rolling mill used in the manufacture ofslide fastener elements, which gage constantly checks the overall widthof the rolled wire, the height of the headsan'd the registering of thehead pro- 'jections and head recesses, and automatically stops therolling mill if anyone of these three factors does not conformtopredetermined re quirements. I

Another object is to provide such a combined gage control mechanismwhich, while stopping the rolling mill as hereinbefore indicated, will lo signal to the operator and identify which of the three factorshereinbefore set forth is defective, thus enabling the operator to knowat once where the trouble lies,

A further object is to provide a gage control mechanism of the characterindicated which is endowed with a high sensitivity, and which isabsolutely foolproof in its operation.

A still "further. object is to provide-a, gage control -mechanism of thecharacter indicated :Fig. i5 1is zancross-section .of the mechanism offF-ig."1, taken on the ,line -5-,5"of Fig.4, looking :in thedirectionzof the arrows.

Figzfids :azbottomgplansview -of the mechanism ofFig. 1.

Fig. '7 is :an elevational :view at an'enlarged scaleao'f adetail ofFig. 1.

*Referring. nowzin detailtothe-drawings, In indicates .a support oribasecforthe gage control mechanism, which .can be-imountedaon or many.suitable way. attached to the wire rolling :mill or Tlike :machine towhichtthis invention is to be apaplied. 'The wire, indicated at' l l,enters-thez-gage between two superimposed rollers .l 2 and 1.3 :with thehead-projections l4 thereof on'the top. The top -roller I2 is =-provided"with indentations 16 to --receive the projections t4, iwhereasytheibottom-roller l3 ispprovided withprotuberances I! to engage the matingrecesses .15. 'The engage- *ment of the protuberances and indentations:of .1,

itherollers with the recesses and projections respectivelyof the rolledwire maintains the rollers in alined relationship with these latter.

'Rigidly'attached to the base there iis-a stud or-pin t8 upon which ispivotally mounted a forked support l9 embodying two arms' 120. "The-arms* are rig-id witha shaft orpin 2l on:which thetoproller I2 isrotatably-mounted. Alternatively, the roller l2 could'be keyed' to theshaft'ZI and-this latter be rotatably supported in the'arms 20. A lever'22 is inserted into a seat 23 in one of the armsZ-B. A tension spring24 is attached to the *endof lever 22'and also to the base I0, and:constantly urges the 'whole forked support l9 with" its; attachmentsdownwardly. 'Thus the top roller 12 is resiliently urged towards thebottom roller 13 firmly to engage the wire H passing ,therebetween.Asupport 25 is attached to the bottom of thebase l0 and has a shaftor*pin:26 secured in invariable positioned relationship "thereto.'The'pin ZG has the bottom roller l3 *fre'ely mounted thereon, but saidbottom-roller, inadditionto being rotatableon the -shaft 26, is also'slidably axiallythereon by a'limited amount. Alternatively, as :inthecase of-the toproller, the bottom roller 13 could be keyed to the shaft26, andthis latter rotatably supported in thesupport 4'5, or any 'otherequivalent arrangement could be employed. :At-any rate, the tworollersfirmly :gr'ip the wire and rotate as it advanceseintorthe placed withrespect to the top roller.

3| .to-each lever 21.

there is a bridge'32 fixed to the base Land-elecgage. The lateralposition of the wire is determined by the engagement of its headprojections with corresponding indentations of the top roller. As longas the embryo elements are properly formed, that is the head projectionsand recesses are relatively centered, the bottom roller remains in exactunderlying relationship to the top roller,

inasmuchas it,,has protuberances which engage the head recesses of thewire. 7 projections are laterally displaced with respect to the headrecesses, due to faulty operation of the .wire rolling mill, the bottomroller is forced to But if the head follow the head recesses and becomesaxially dis- It is to be understood that the roles of the two rollerscould be reversed, and that the details of the assembly couldbemodifiedwithin the scope of the invention, as long as means areprovided equivalent to those described for producing a lateraldisplacement of one roller with respect to the other in response to :anydefective conformation of the embryo'fastener elements.

Two levers 21, pivoted at .28 to the'bottomof' the'base. l0 :havepoints'=29 engaging the bottom roller l3 at eachside thereof. The levers21-=are connected to one another at the end opposite'the points 29, by abridge 3!] pivotally connected at Between the two levers 21tricallyconnected to -a wire schematically indicated at 33. Each lever21 carries a contact 34 connected to a wireschematically indicated at35. The'wires'33 and 35 form part of a circuit including a'signal lightor other signal, which circuit is closed whenever either one of thecontacts 34 touches the bridge 32. As long as the bottom roller l3 isexactly underlying the top roller [2,

neither contact 34 touches the bridge -32,-butas soon as the-roller l3ceases to'be centered and shifts slightly, torone or the other side, oneof th-e points 29 is urged away fromits normal position, causes thecorresponding lever 21 to swing about its pivot ,28, making contact andlighting thelight.

The bridge .30 has a 'V -shaped recess 36 in the center thereof, againstwhich bears aero'ller3l connected to a spring 38 of a micro-switch 39.When the levers, 21 are intheir normal position, that is in the positionthey assume when the roller 13 underlies the roller I2, said roller 31engages said recess 3612.1 its central or deepest por- ..tion, and themicro-switch 39 does notmake con- .tact. However, if either lever 21 iscaused to swing as explained above, the roller 3'! will ride up one ofthe two inclined planes which makeup the recess 36 .of the bridge 3!)and will move to the left, as viewed in Fig. 6, thus making contact inthe micro-switch 39 and shutting ofi the motor which operates therolling mill.

,.As s00n:as the rolled wire has passed between the rollers l2 and I3and under the forked support L9, it passes under a rounded point40carried on or, forming part of a lever 4| pivoted at 42 to a supportblock 43 suitably attached to the to top. as viewed in Fig. 1. A ,roller41 bears against the; inclined plane 4.6,and is carried byan arm 48attached to a spring 49 of a micro-switch 7 :150. iiIfhearmzfljsx-bearsiagainst an inclinfldgnlane engaged from each other.

position, illustrated in Fig. 7, the lever 52 touches,

screw 65.

5| of a lever 52 pivoted at 53 to the support 54 of the micro-switch 50.The arm 48 is provided at its left bottom edge with a hook projection55. The lever 52 has a corresponding hook projection 56, best shown inFig. 7.

' The rounded point 40 of the lever 4| rides over the head projections Mof the rolled wire II. The weight of the lever itself keeps the point 40in engagement with the head projections; it is to be understood howeverthat independent means could be provided, were the device so constructedas to make this desirable, to assure said engagement, and said meanscould comprise a spring or springs. If the height of one of said headprojections is less than the predetermined desired height, the point 40drops, and its motion is transmitted with considerable amplification tothe free end of the lever 4!. As a result, the inclined plane 46 urgesthe roller 41 to the left, as viewed in Fig. 1, to make contact in themicro-switch 50 shutting off the motor which operates the rolling mill.In general,.however, if only one or very few heads are defective, thelever 4| would not remain in its depressed position and the arm 48 inits leftwardly position, wherein it closes the switch, for a long enoughtime properly to actuate the switch. For this reason a lock is providedto hold the arm 48 in said leftwardly position, once it has assumed it,and this lock consists of the hook projection 55 of the arm 48, the hookprojection 56 of the lever 52, and the spring 51 which constantly urgesthe lever 52 upwards. Once the arm 48 has moved far enough to the leftfor the two hook projections to engage each other, it

cannot return to the right unless it is unlocked by depressing the lever52, against the action of the spring 51, until the hooks 55 and 55 aredis- When in its locked a contact 58 attached to a bridge 59. The bridge59 is electrically connected to a wire schematically indicated at 60,while the lever 52 is electrically connected to a wire schematicallyindicated at 6 I Both wires 65 and GI are part of an electric circuitwhich includes a signal light, or other signal, different from thesignal connected to the wires 33 and 35.

Normally the arm 48, by hearing against the inclined plane 5|, maintainsthe lever 52 in a position sufficiently depressed to prevent this latterfrom touching the contact 58. But when the dropping of the lever 4|, dueto insuificient .height of a head projection, causes engagement of thetwo hook projections 55 and 56, as hereinbefore set forth, the lever 52is allowed to rise enough to touch the contact 58, and the signal isenergized.

After contacting the point 40, the rolled wire passes under a bridge 62.Said bridge 62 is adjustably mounted on the base l0 by means of pivotscrews 63 attached to bracket 64 and adjusting The pivot screws 53define alined centers about which the bridge 62 is pivotable to raise itor lower it by turning the adjusting screw 65. Said bridge 62 isprovided internally with a shoulder 56 which forms a guide for one edgeof the rolled wire, and is suitably positioned relatively toithe toproller so that the'wire is caused to follow a substantially straightline. Slidably mounted internally of the bridge 62 there The end of theblock 61 wire is in contact with a plate 68 and this latter 1| to theframe If). "Said lever 10 has mounted thereon a fork 12 the two fingersof which straddle a pin 13 attached to a bridge 14.

The fork 12 is electrically connected to a wire schematically indicatedat 15, while the bridge 14 and the pin 13 are electrically connected toa wire schematically indicated at 16. Wires "I5 and I6 form part of anelectric circuit which includes a signal light or other signal,different both from the signal connected to wires 33 and 35 and from thesignal connected to wires Bland 5|. A tension spring 11 operativelyconnects the lever 10 to the base l0, and constantly urges-the point 69of the lever 10 against the plate 68, said plate against the block 61,and this last against the edge of the wire I I that is not in contactwith the shoulder 66. The normal position of the lever it, that is theposition it assumes under the urging of the spring 11, when the width ofthe rolled wire is within predetermined tolerance limits, is such thatthere is a slight clearance between the pin i3 and the two fingers ofthe fork 12, so that the circuit including the signal light remainsopen.

The end of the lever 10 opposite the rounded point 69 has a V-shapedrecess 78 defined by two inclined planes. A roller 19 mounted on aspring 236) of a micro-switch 8| engages the recess 18. In the normalposition of the lever 10, said roller is is situated in the central ordeepest portion of the recess 18, and the micro-switch does not makecontact. However, if the width of the rolled wire does not conform tospecifications, that is, if it exceeds the aforementioned tolerancelimits by being too large or too small, the block 61 will be forced awayor allowed to move towards the shoulder 55 under the urging of thespring "11, as the case may be. The point 69 of the "lever Ill willfollow the motion of the block, and consequently the lever Iii willswing away from its normal position in one or the other direction. Thenthe roller 19 will ride up one of the two inclined planes which definethe recess 18, will be forced to the left, as viewed in Fig. 6, and willcause the micro-switch 8| to make contact, shutting off the motor whichoperates the ,wire rolling mill. Concurrently one of the two fingers ofthe fork '52 will contact the pin 13, closin'g'the circuit of the wires15 and 15, and energizing the signal. It is obvious that arrangementsother than the one described could be used to swing the lever 10 inresponse to any departure of the width of wire from the predeterminedpermissible limits.

It is seen therefore, that the present invention provides in one unit agage control, device for the three properties of the 'Wire' discussed"at the beginning of this specification, namely, the width of the Wire,the height of the heads, and the registering of the recesses andprojections which form the heads. A defect in any one of these threeproperties will result in automatically stopping the wire rolling mill,and also in signalling to the operator which of the three properties isdefective, since a different signal isprovided for each one of them.

While I have taken-into account defects in'the width of the wire oriii-the registration of the head projections and recesses in either ofthe two possible directions, that is, while I contemplate that the wiremay be eithertoo wide or too narrow and that the head projections may beshifted either to the right or to the left of their centeredpositionwith respect tothehead recesses,

with a rounded point 69 of a lever 10 pivoted at I consider that theonly defect in the height "of aminothe :headsto be takeniinto account isan insuffition-and bearing the teachings of this specification in mind,could so modify the device. as to render it-sensitive .also to anyexcess in the height of the heads, .and such .a modification -could beaccomplished by the exercise of .no more than mechanical skill.

In the preferred embodiment described, the partiof thegage whichrespondsto defects in the height oflthe heads hasbeenprovided with alockarrangement to allow it to operate effectively no matter how short thedefective portion of the wirewmay be. Theremaining parts of the gage,ihave not been ,provided with any such lock arrangement, for the reasonthat .in practice Ilfind rangements-could be introduced in the parts oflthe .gage which respond to defects in the width o'f the wire or intheregistration of the head projections and. recesses, and such lockarrangementsimig'htbe similar in structure to the. lock arrangementdescribed or might consist of equiv- .alent mechanical devices, such asmay be contrived by a person skilled'in the art being in p05- :sessionofteachings of this specification.

,ltfis -to be understood that, for any of the propertiesof the Wire towhich this invention is r lated, thereare certain predeterminedtolerances within which the wire is acceptable.

ywillbe designed correspondingly to said prede- The gage terminedtolerances, and variations in said toierances will result in variationsin the, particular proportions and dimensions -of the various parts ofthe device, such as thevarious levers and associatedmeans. Thesevariations are a matter of .judicious design and can be provided by agitndinall-y moving said deformed wire, a ,first roller .means engaging-th'el head {projections .of said embryo slide fastener elements, .asecond roller means engaging the head .recessesof said embryo slidefastener elements, said respective roller means normally being inlateral alignment and one of said roller means being axially movablewith respect 'to the other, said first and sec- -.ond roller meansmaintaining a normal positioned relationship as long as said headprojections and the corresponding .head recessesare centered withrespect to one another and becompersonskilled in the art. It isnot-thought neces-" :saryv therefore to discuss them at length here.'Itis noted, however, that a device according to this invention can berendered as sensitive as may be desirable inpractice under any possibleconditions, by properly dimensioning and arranging the various componentparts thereof.

It .is understood that Whenever the wire rolling mi'll stops as a resultof the operation of this gage, the defective part of the roiled wirecan'be will be'finally produced, and, knowing what the defect is, propersteps can be taken to correct the same. As to such steps, they are notmaterial in discussing this invention and need not be gone into 'here.

adaptations .may be .made therein by persons skilled in the art, withoutdeparting. .from the "spirit :of-the invention or exceeding the :scopeof the appended claims.

-,-. :1. Inca mechanism of the character described for gauging thealinement of the headprojection's Land the head recesses of connectedembryo .scoops, which projections and recesses are profduce'dionopposite sidesof a continuous length nf enre by deformation-thereof,means .for lonfeliminate'd so that no defective fastenerelements ing relatively displaced by an embryo slide fastener elementwhen said head projections and the corresponding headrecesses thereof'are not so centered, and lever means operatively associatedwith .atleast one of said roller means, said lever, means .being displaceablefrom .a, normal positionin response to a relative displacementgof saidroller means.

2. In ,a mechanism of the character described for gauging the alignmentof the headprojections and the head recesses of connected embryo scoops,which projections and 'recessesiare produced on oppositesides of acontinuous length of Wire by deformation thereof, means forlongitudinally moving said deformed wire, :a first roller means engagingthe head projections of said embryo slide 'fastenerelements, asecondroller means engaging thehead recesses of said enibryo slidefastener elements, said respective roll er means normally being inlateral alignment and one of said roller means being axiallymovable'with respect to the other, resilient means for 'urgirrgsaid'first and second roller means towards one another firmly to gripthe wire therebetw'e en, said first and second roller means maintaininga normal positioned relationship as long as said headprojectionsand thecorresponding head recesses are centered with respect to one another andbecoming relatively 'displaced by an embryo slide fastener element whensaid head projections and the corresponding head recesses thereof arenot so centered, and lever means operatively associated with at leastone of said roller means, "said lever means bein displaceable from anormal position in response to a relative displacement of said rollermeans. t

3. In a mechanism of the character described for gauging the alignmentof the head projections and the head recesses of connected embryoscoops, which projections and recesses are produced on opposite sides ofa continuous length of wire by deformation thereof, means forlongitudinally moving'said deformed wire, at least one roller havingprojections along the periphery thereof engaging the head recesses ofsaid embryo slide fastener elements, at least one'second 'roll'er havingrecesses along the periphery there- "of engaging'the head projectionsof'said embryo slide'fastener elements, said first and'secondrollrespe'ctto one another by an embryo slide fastenerelement when saidhead projections and the corresponding headrecesses thereof "are not socentered,-'and'1ever means operatively associated with at least oneofsaid rollers, said lever means being displaceable from'a normal positionin response to relative displacement of saidtrollers.

'4. Ina mechanism of the character described for augingthe alignment ofthe headlplfo'jections "and'the head recesses of 'connectedembr'yoscoops, which projections and recesses are produced on opposite sides ofa continuous length of wire by deformation thereof, means forlongitudinally moving said deformed wire, a base, a first rollerrotatably attached to said base and having projections along theperiphery thereof engaging the head recesses of said embryo slidefastener elements, a second roller rotatably attached to said base andhaving recesses along the periphery thereof engaging the headprojections of said embryo slide fastener elements, one of said rollersbeing axially slidable with respect to said base, said first and secondrollers maintaining a normal aligned position relationship as long assaid head projections and corresponding head recesses of an embryo slidefastener element are centered with respect to one another, and saidaxially slidable roller being displaced away from a normal position byan embryo slide fastener element when said head projections of saidembryo slide fastener elements and the corresponding head recessesthereof are not relatively centered, means for urging at least one ofsaid rollers towards the other firmly to grip the wire therebetween, andlever means associated with said axially slidable roller, saidlevermeans being swingable from a normal position in response to slidingof said axially slidable roller.

5. In a mechanism of the character described for gauging the alignmentof the head projections and the head recesses of connected embryoscoops, which projections and recesses are produced on opposite sides ofa continuous length of wire by deformation thereof, means forlongitudinally moving said deformed wire,a base, a first rollerrotatably attached to said base and having projections along theperiphery thereof engaging the head recesses of said embryo slidefastener elements, a second roller rotatably attached to said base andhaving recesses along the periphery thereof engaging the headprojections of said embryo slide fastener elements, one of said rollersbeing axially slidable with respect to said base, said first and secondrollers maintaining a normal aligned position relationship as lon assaid head projections and correspondin head recesses of an embryo slidefastener element are centered with respect to one another, and saidaxially slidable roller being displaced away from a normal position byan embryo slide fastener element when the head projections and thecorresponding head recesses thereof are not relatively centered,resilient means for urging at least one of said rollers towards theother firmly to grip the wire therebetween, and lever means pivoted insaid base and having portions laterally en- 4 gaging said axiallyslidable roller, whereby said lever means are swingable in response toaxial motion of said axially slidable roller.

6. In a mechanism of the character described for gauging the alignmentof the head projections and the head recesses of connected embryoscoops, which projections and recesses are produced on opposite sides ofa continuous length of Wire by deformation thereof, means forlongitudinally moving said deformed wire, first roller means engagingthe head projections of said embryo slide fastener elements, secondroller means engaging the head recesses of said embryo slide fastenerelements, said first and second roller means maintaining a normalpositioned relationship as long as said head projections and thecorresponding head recesses are centered with respect to one another andbecoming relatively displaced by an embryo slide fastener element whensaid head projections and the corresponding head recesses thereof arenot so centered, lever means operatively associated with at least one ofsaid roller means, said lever means being displaceable from a normalposition in response to relative displacement of said roller means, acam surface operatively connected to said lever means, a. followeroperatively associated with said switch means and engaging said camsurface, said lever mean when they become displaced by a predeterminedamount from their normal position actuating said cam surface to displacesaid follower.

7. In a mechanism of the character described for gauging the alignmentof the head projections and the head recesses of connected embryoscoops, which projections and recesses are produced on opposite sides ofa continuous length of wire by deformation thereof, means forlongitudinally moving said deformed wire, a first roller means engagingthe head projections of said embryo slide fastener elements, a secondroller means engaging the head recesses of said embryo slide fastenerelements, said respective roller means normally being in lateralalignment and oneof said roller means being axially movable with respectto the other, said first and second roller means maintaining a normalpositioned relationship as long as said head projections and thecorresponding head recesses are centered with respect to one another andbecoming relatively displaced by an embryo slide fastener element whensaid head projections and the corresponding head recesses thereof arenot so centered, and lever means operatively associated with at leastone of said roller means, said lever means being displaceable from anormal position in response r to a relative displacement of said rollermeans,

and means operatively connected with and actuated upon the displacementof said lever from normal position for signalling such movement.

8. In a mechanism of the character described for gauging the alignmentof the head projections and the head recesses of connected embryoscoops, which projections and recesses are produced on opposite sides ofa continuous length of wire by deformation thereof, means forlongitudinally moving said deformed wire, at least one roller havingprojections along the periphery thereof engaging the head recesses ofsaid embryo slide fastener elements, at least one second roller havingrecesses along the periphery thereof engaging the head projections ofsaid embryo slide fastener elements, said first and second rollermaintaining a normal positioned relationship as long as said headprojections and the corresponding head recesses are centered withrespect to one another and being axially displaceable with respect toone another by an embryo slide fastener element when said headprojections and the corresponding head recesses thereof are not socentered, and lever means operatively associated with at least one ofsaid rollers, said lever means being displaceable from a normal positionin response to relative displacement of said rollers, and meansoperatively connected with and actuated upon the displacement of saidlever from normal position for signalling such movement.

9. In a mechanism of the character described for gauging the alignmentof the head projections and the head recesses of connected embryoscoops, which projections and recesses are produced on opposite sides ofa continuous length of wire by deformation thereof, means forlongitudinally moving said deformed wire, a base, a first rollerrotatably attached to said base and having projections along theperiphery thereof engaging the ersgbeingvaxially slidaple with r sgcytqsgiq g said: first and secondrqlleys maigtajrfipg; 2 mal l e DQSiQ QQIaFiQIi P lbng as aid s p j c s 1 cprresnqndi j 29W; 93" 8 ct anembryoslidq fgsjen@1 glemegnt ayg ce v with rgspect to one. a q he a 5. a jliy l abl'e roller being displa qeq ayqay from normal position by anembryo slide fasteng'er 'qlmiit when the head pr ojeptions of saidembryo slid f s e re mfints and he. q rrvsp d n d e esses hereoflare n tlg iv ly. en e ean for urging at 1 e ast, qne q f; sgiql IQllejtstowards the" other finml o r hev ir l th b w and levgr mea s sspqia edwith ai Xiflll im le o ler, aidg qv n m vaxzshein win' abl ma a n m osito llesnql l ev 1.7 -s -ri xially l d e pllex, m ansqp v l c91 nected Wjman tua c 4119 he; ipl q fi ifif of sai leve mm 9mm VP Siti nY 9 S gn iuch mov m t r a mec an sm t-. hg, h ia nen descrihgd for au in hg a inmfinfi Q. 1 d rpi q m pdith headx ce gofi qnn q d em ty vscq s wh m pri. n and r cqsfiqs are pr uc d on o pqsitgslclfi of; a umin 1 gfl fi ofe by d io m i r hQ QQfi; m zli r" sit n moy n aid 9rn2Qd W fir z 9l Q inens eng in gthg head ojgc iq'ns of id: nh yb ide fa tenext elements. 991, 11 m ans enga in the. he d-z ne 01 d embr p. i e e emi nti aiirstandfifiwlld r l r 'm a n glg jaion hinas 1mg R ERENCES ITE Thefollowing. reffirences am. of lieqord; in, the

file Of this, patent:

UNITED STA'EEQBATEN'IIS Nam?- Niqolgt Rpm n N mber. M 4

